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Please use this identifier to cite or link to this item: http://dyuthi.cusat.ac.in/purl/4556

Title: FT-IR and FT-Raman study of Nasicon type phosphates, ASnFe(PO4)3 [A=Na2, Ca, Cd]
Authors: Junaid, Bushiri M
Antony, C J
Aatiq, A
Yohannan Panicker, C
Hema, Tresa Varghese
Manojkumar, T K
Keywords: FT-Raman
FT-IR
Nasicon
Phosphates
Issue Date: 15-Nov-2010
Publisher: Elsevier
Abstract: FT-Raman and FT-IR spectra of ASnFe(PO4)3 [A=Na2, Ca, Cd] were recorded and analyzed. The bands were assigned in terms of the vibrational group frequencies of SnO6 octahedral and PO4 tetrahedral. The spectral analysis shows that the symmetry of corner shared octahedral (SnO6) and the tetrahedral (PO4) are lowered from their free ion symmetry state. The presence of Fe3+ ions disrupts the S–N–O–S–N chain in the structure. This causes distortion of SnO6 and PO4 in the structure of all the compounds. Also it is seen that there are two distinct PO4 tetrahedra of different P–O bond lengths. One of these tetrahedra is linearly distorted in all the title compounds. The PO4 frequencies and bond lengths are calculated theoretically and are in agreement with the experimental values. The presence of PO4 polyanion in the structure can reduce the redox energy and hence reduce the metal oxygen covalency strength in the structure
Description: Spectrochimica Acta Part A 78 (2011) 415–419
URI: http://dyuthi.cusat.ac.in/purl/4556
Appears in Collections:Dr.Junaid Bushiri M

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